Music Theory Through the Lens of Programming

1class="text-category-tech font-medium">const chromaticScale = [class="text-category-music">'C', class="text-category-music">'C#', class="text-category-music">'D', class="text-category-music">'D#', class="text-category-music">'E', class="text-category-music">'F', class="text-category-music">'F#', class="text-category-music">'G', class="text-category-music">'G#', class="text-category-music">'A', class="text-category-music">'A#', class="text-category-music">'B']
2
3// Major scale pattern: W-W-H-W-W-W-H (2-2-1-2-2-2-1 semitones)
4class="text-category-tech font-medium">const majorPattern = [0, 2, 4, 5, 7, 9, 11]
5
6class="text-category-tech font-medium">function getMajorScale(root: string) {
7  class="text-category-tech font-medium">const rootIndex = chromaticScale.indexOf(root)
8  class="text-category-tech font-medium">return majorPattern.map(interval => 
9    chromaticScale[(rootIndex + interval) % 12]
10  )
11}